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KMID : 1024520160250111511
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Journal of the Environmental Sciences
2016 Volume.25 No. 11 p.1511 ~ p.1519
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Drought Classification Method for Jeju Island using Standard Precipitation Index
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Park Jae-Kyu
Lee Jun-Ho
Yang Sung-Kee
Kim Min-Chul
Yang Se-Chang
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Abstract
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Jeju Island relies on subterranean water for over 98% of its water resources, and it is therefore necessary to continue to perform studies on drought due to climate changes. In this study, the representative standardized precipitation index (SPI) is classified by various criteria, and the spatial characteristics and applicability of drought in Jeju Island are evaluated from the results. As the result of calculating SPI of 4 weather stations (SPI 3, 6, 9, 12), SPI 12 was found to be relatively simple compared to SPI 6. Also, it was verified that the fluctuation of SPI was greater fot short-term data, and that long-term data was relatively more useful for judging extreme drought. Cluster analysis was performed using the K-means technique, with two variables extracted as the result of factor analysis, and the clustering was terminated with seven-time repeated calculations, and eventually two clusters were formed.
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KEYWORD
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Jeju, SPI, Cluster center, Drought, Classification method
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